Window-sash fastener



Patented Aug. 9, 1927.

s airs stairs-S WILLIAM J. COLLINS, or BRooKLYiLNEW Yoan. il 'i WINDOW-SASH FASTENER.

Application filed July 26, 19726. Serial N0.v 124:,99.-y

The present invention has for its` object the production of a simple and .effectivefastening device for securing a window sash against improper opening, the device being automatic in its action and capable of holding the window against opening movement beyond the point selected for mounting the fastening device. To this end the improved fastening ldevice comprises a body member adapted to be secured adjacent the path of the window sash, either in the window frame or in the Stile of a companion window, and an automatic fastening dog mounted upon a pivot in the body member and formed withv a lug which projects into the path of the top rail of the sash and further formed with a cam surface extending eccentrically to the pivot and so positioned with reference to the lug that the engagement ofthe sash rail with the lug forces the cam surface into gripping engagement with the sash rail and prevents further opening movement of the sash. The automatic gravity dog normally rests with its lug in the path of the` controlled sash, but can readily be moved inwardly to permit free movement of the sash past the fastening device. In order that the invention may be fully understood, it will first be described with reference to the accompanying drawings and the novelty afterwards more particularly pointed out in the annexed claims.

ln said drawings Figures 1 and 2 are vertical sectional views of parts of two adjacent window sashes showing the improved fastening de-` vice in different positions;

Figure 3 is a detail horizontal sectional view taken on the line 3-3 of Figure 1;

Figure t is a face view of the improved sash fastener.

Part ofv a window frame is shown at 1 in which there are the usual guideways 2 and 3 to receive the upper and lower win,- dow sashes. The stile 5 of the upper sash is mortised at 6 to receive the flanged body 'l' of the improved fastening device. kThis body member 7 is suitably secured to the face ofthe stile by any means such as the screws 8 shown. A pivot pin 10 is mounted in the flange side walls of the body 7 and the gravity fastening dog is freely pivoted upon this pivot 10. The dog comprises a hub portion 11 through which pivot 10 eX- tends, a lug 12 and a cam face 13. The main body of the dog on which parts 12 and 13 are formed hangs downwardly from the pivot and the device is so mounted upon the stile of the upper sashthat the lug 12 will project normallyinto vthe path of the i top rail 2O of the lower sash. The lower sash is free to move in opening direction until saidy top rail engages the lug 12,

which moves the fastening dog s'lio'htly uponv its pivotvand forces the cam surface 13 into engagement with the edge of the top rail or the face of the stile of the lower sash. The more pressure that is applied to force open'the lower sash causes the fastening .dog to move into tighter gripping engagement with the sash.

As indicated in dotted linesiin Figure l, i

of a window. It will be clear that the device can also be mounted in the window frame although in this suggested mounting the security will not be as great unless the upper sash were provided with an independent locl. The useV of the device is Apreferably as illustrated in the drawings in which it acts as a safety fastening device for both the upper and lower sashes.

I claim: 1. A sash fastener comprising a body .member adapted to be secured adjacent to the sash path, and a fastening dog mounted f lupon a pivot ingsaid body member, said dog being formed with a sash-engaged ylug and a sash-gripping cam surface extending eccentrically to said pivot. Y

2. A sash fastener comprising a body member adapted to be secured adjacent to the sash path, and an automatic gravity' fg y y 1,688,088

dog pivotally mounted upon said body member, said dog being formed With a sash-en gaged lug and a @am surface extending therefrom in position to grip the Sash.

3. A sash fastener comprising a body member adapted t0 be mounted upon a support alongside the path of the sash to be fastened, and a fastening dog pivoted upon said body member and formed with a Sashengaging lug normally resting in the path of the sash, and aV cam Surface extending from said lug in position to be forced into gripping engagement With the sash by the action of the sash upon said lug.

WILLIAM J. COLLINS. 

